Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02db83fae53c076…

MALICIOUS

PDF

46.8 KB Created: 2021-05-15 17:05:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 76d7562ebc1634365188746c895b2f0b SHA-1: 1417692da9e3810a12675abf30b7a81003375af2 SHA-256: f02db83fae53c076a5212a65ac52c348a946967c5eaa20d46972e533812bf1ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures for popular mobile games. The document body and extracted URLs strongly suggest a phishing or malware distribution attempt, likely leading users to sites that host further malicious content or attempt to steal credentials. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-free-spins-link-blogspot-2021-game-hack In PDF document text
    • http://engelum.com/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://engelum.com/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://engelum.com/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://engelum.com/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://engelum.com/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://engelum.com/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://engelum.com/images/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://engelum.com/images/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://engelum.com/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://engelum.com/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://engelum.com/images/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://engelum.com/images/collect-robux_GM431946152.pdfIn PDF document text
    • http://engelum.com/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://engelum.com/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://engelum.com/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://engelum.com/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://engelum.com/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://engelum.com/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://engelum.com/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://engelum.com/images/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A3E 27352 bytes
SHA-256: ef6510a9cccef79c92727a554800b15cd2f044da78160b0a44b9f1436d5f690b
font_01_sfnt_off000088a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A2 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00009243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9243 19036 bytes
SHA-256: a1db0e26d638f2546736f1f7b434dee98a1c5e726f40723477b7c203db66759e

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